Purpose: Global spending on sponsorship continues to rise and many companies now establish portfolios containing a range of sponsorships across sport, arts and cause-related activities. Yet a lack of practical methodologies for the measurement and comparison of sponsorship performance within a portfolio context remains a challenge. Sponsors often rely solely on proxy measures for brand exposure drawn from advertising. These do not capture the higher-level outcomes of sponsorship awareness and goodwill transfer, often attributed to sponsorship as a ‘halo effect’. This paper presents a matrix tool that combines consumer awareness of and goodwill for a sponsorship so the halo effects of sponsorships within a portfolio can be quantified and compared. Design/methodology/approach: This archival analysis study is based on six years of brand tracking data (comprised of some 15,500 consumer surveys) supplied by a large Australian company. A sponsorship portfolio matrix is developed to measure the halo effect. Findings: This study demonstrates that a sponsorship’s halo effect can be measured and comparisons drawn across sponsorship types within a portfolio. The study shows that despite the significantly higher levels of brand awareness achieved by commercially oriented professional sports sponsorship types, community relations oriented sponsorship types achieve a greater halo effect due to their more positive impact on the sponsor’s brand attributes. Originality/value: The matrix provides a valuable tool by which sponsorships can be compared, evaluated and managed to meet the longer-term brand and marketing objectives of a company.